南国原 大吾

Spirited and somewhat eccentric, Daigo Minamikokubaru is a second-year student. A classmate, he befriends Kazuma almost immediately on his first day of the school, acquainting him with the campus and even the profiles of some of the girls he meets; jealous of his unintentional success with women. As a sign of brethren respect, he frequently addresses Kazuma "brother". Daigo is the son of the second-year homeroom instructor.